34 lines
784 B
Go
34 lines
784 B
Go
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package iter
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// Callback receives a value and returns true if another value should be
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// received or false to stop iteration.
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type Callback func(value interface{}) (more bool)
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// Func iterates by calling Callback for each of its values.
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type Func func(Callback)
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func All(cb Callback, fs ...Func) bool {
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for _, f := range fs {
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all := true
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f(func(v interface{}) bool {
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all = all && cb(v)
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return all
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})
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if !all {
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return false
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}
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}
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return true
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}
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// Calls `cb` with the first value yielded by `f` and then stops iteration. `ok` if `cb` was called
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// with a value. Returning the value interface{} would require the caller to keep a
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func First(f Func) (value interface{}, ok bool) {
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f(func(x interface{}) bool {
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value = x
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ok = true
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return false
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})
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return
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}
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